THE SPRINGFIELD UNION, Massachusetts, April 12, 1963

* USS Thresher (SSN-593) disaster - 1st nuclear sub lost at sea - remains world's worst submarine disaster in U.S. history
* Nuclear powered submarine - the most advanced attack submarine of its day

The front page has the 3-line, 5-column heading: "UNDERSEA SOUNDS HEARD WHERE SUB SANK IN ATLANTIC", with subheads including: "Seawolf Picks Up Tapping but Navy Still Pessimistic", "4 Families From Western Mass. in Mourning For Relatives Aboard Lost Atomic Submarine", and more. A related photo is present as well (see images). Additional coverage with photos are found on page 6. Other news of the day is present throughout.
Complete in 44 pages, one small archival mend it the lower left-corner margin, in good condition.